Photoluminescence characteristic of magnesium boro-tellurite doped Eu3+ ceramic
The series samples of xTeO2-(70-x) B2O3-30MgO with 0=x=30 mol% have been prepared via the solid-state reaction method. The composition sample of 30TeO2-40B2O3-30MgO were chosen as a doped sample in the composition of 100-y(30TeO2-40B2O3-30MgO)-yEu3+ with 0.2=y=2 mol% and were heated at 750oC. The XR...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Penerbit Universiti Kebangsaan Malaysia
2015
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| Online Access: | http://eprints.utm.my/id/eprint/58830/1/NurZuIra2015_PhotoluminescenceCharacteristicofMagnesiumBoroTellurite.pdf http://eprints.utm.my/id/eprint/58830/ http://dx.doi.org/10.17576/jsm-2015-4409-19 |
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| Institution: | Universiti Teknologi Malaysia |
| Language: | English |
| Summary: | The series samples of xTeO2-(70-x) B2O3-30MgO with 0=x=30 mol% have been prepared via the solid-state reaction method. The composition sample of 30TeO2-40B2O3-30MgO were chosen as a doped sample in the composition of 100-y(30TeO2-40B2O3-30MgO)-yEu3+ with 0.2=y=2 mol% and were heated at 750oC. The XRD results showed that the major phase was Mg(Te2O5) while MgO(B2O3)2, MgTe6O13, Mg2(B2O5) and MgB4O7 was observed as a minor phase. The small phase of EuB2O4 and Eu2Te4O11 were detected by XRD when the composition of 30TeO2-40B2O3-30MgO were doped with 1.5% of Eu3+. The EDX analysis of 30TeO2-40B2O3-30MgO doped with 1.5% Eu3+ sample was confirmed the presence of boron (B), magnesium (Mg), tellurium (Te), oxygen (O) and europium (Eu) elements. From the FESEM images, the surface morphology of doped 1.5% Eu3+ samples was agglomerated compared with the undoped sample. The average diameter of the grain size is in the range of 50-100 µm. The emission spectra of the Eu3+-doped 30TeO2-40B2O3-30MgO ceramic consists of intense and sharp lines ranging from 550-725 nm. The luminescence spectra showed that the emission intensity of 30TeO2-40B2O3-30MgO doped with Eu3+ was enhanced with the increase of Eu3+ ion from 0.2 to 1.5 mol%, which resulted in enhancement of the red emission of the samples. The longest decay time for 30TeO2-40B2O3-30MgO doped with 1.5 mol % Eu3+ was 0.892 ms. |
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